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United States Patent | 6,255,783 |
Parker | July 3, 2001 |
A power supply for a gas discharge lamp that provides a constant current to the lamp even when there are variations in a DC input voltage includes an inverter having a drive transformer that is controlled without negative feedback to operate close to its resonance condition, which permits a substantially constant load current even for large variations of the DC input voltage to the power supply.
Inventors: | Parker; Francis J. (Cooper City, FL) |
Assignee: | Ventex Group LLC (Riviera Beach, FL) |
Appl. No.: | 042940 |
Filed: | March 17, 1998 |
Current U.S. Class: | 315/219; 315/224; 315/291; 315/307 |
Intern'l Class: | H05B 037/02 |
Field of Search: | 315/307,224,219,209 R,283,220,291,DIG. 7 |
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